<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This file documents the use of the GNU compilers.

Copyright (C) 1988-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Funding Free Software", the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>m68k Function Attributes (Using the GNU Compiler Collection (GCC))</title>

<meta name="description" content="m68k Function Attributes (Using the GNU Compiler Collection (GCC))">
<meta name="keywords" content="m68k Function Attributes (Using the GNU Compiler Collection (GCC))">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html" rel="start" title="Top">
<link href="Indices.html" rel="index" title="Indices">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Function-Attributes.html" rel="up" title="Function Attributes">
<link href="MCORE-Function-Attributes.html" rel="next" title="MCORE Function Attributes">
<link href="M32R_002fD-Function-Attributes.html" rel="prev" title="M32R/D Function Attributes">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en_US">
<span id="m68k-Function-Attributes"></span><div class="header">
<p>
Next: <a href="MCORE-Function-Attributes.html" accesskey="n" rel="next">MCORE Function Attributes</a>, Previous: <a href="M32R_002fD-Function-Attributes.html" accesskey="p" rel="prev">M32R/D Function Attributes</a>, Up: <a href="Function-Attributes.html" accesskey="u" rel="up">Function Attributes</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="m68k-Function-Attributes-1"></span><h4 class="subsection">6.33.15 m68k Function Attributes</h4>

<p>These function attributes are supported by the m68k back end:
</p>
<dl compact="compact">
<dd><span id="index-interrupt-function-attribute_002c-m68k"></span>
<span id="index-interrupt_005fhandler-function-attribute_002c-m68k"></span>
</dd>
<dt><code>interrupt</code></dt>
<dt><code>interrupt_handler</code></dt>
<dd><p>Use this attribute to
indicate that the specified function is an interrupt handler.  The compiler
generates function entry and exit sequences suitable for use in an
interrupt handler when this attribute is present.  Either name may be used.
</p>
<span id="index-interrupt_005fthread-function-attribute_002c-fido"></span>
</dd>
<dt><code>interrupt_thread</code></dt>
<dd><p>Use this attribute on fido, a subarchitecture of the m68k, to indicate
that the specified function is an interrupt handler that is designed
to run as a thread.  The compiler omits generate prologue/epilogue
sequences and replaces the return instruction with a <code>sleep</code>
instruction.  This attribute is available only on fido.
</p></dd>
</dl>




</body>
</html>
